Phonograph-stop.



0. H. HANSEN.

PHONOGRAPH STOP.

APPLICATION FILED JUNE l2- [9i].

Patented Nov. 19, 1918.

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'OSWALD H. HANSEN, 0F PORT WASHINGTON, WISCONSIN, ASSIGNOR TO UNITED iPHONOGRAPHS CORPORATION, OF SHEBOYG-AN, 'WISCONSIN.

PHONOGRAPH-STOP.

To all whom it may concern:

Be it known that OSWALD H. Hansen, a citizen of the United States,residing at Port Washington, in the county of Ozaukee and State ofWisconsin, has invented a certain new and useful Improvement inPhonograph-Stops, of, which the following is a specification.

This invention relates to improvements in the construction ofcontrolling devices for sound reproducing machines, and has particularrelation to improvements in automatic stops for phonographs.

An object of. the invention is to provide an automatic phonographstopping device which is simple in construction and efiicient inoperation. Another object is to provide a stopping mechanism which isreadily manipulable and which will operate to automatically stop themachine at a predetermined time. Still another object is to provide anautomatic stop which may be readily I manufactured and which willcooperate with any of the standard sound reproducing machines. A furtherobject is to provide a phonograph stopping device or brake which may bereleased at but one place in order to start the machine, but which maybeset at several places in order to stop the machine. Another object is toprovide a tone arm actuated automatic stop mechanism in which suspensionof elements constituting part of the mechanism, from the tone arm, isavoided.

A clear conception of an embodiment of the invention may be had byreferring to the drawing accompanying and forming a part of thisspecification, in which like reference characters designate the sameparts in the several views,

Figure l is a top view of a sound reproducing machine and an automaticstop, showing the brake set.

Fig. 2 is a top view of a sound reproducing machine and an automaticstop, showing the brake released.

Fig. 3 is a transverse fragmentary vertical section through a phonographcover, and stop supporting bracket, showing details of construction ofseveral elements of the stop mechanism, the section being taken alongthe line III"III of Fig. 1.

The sound reproducingmachine or phothe trip andindicator arms 19,15.

Specification of L tter t t- Patented 12017.19, 1918.

. Application filedJ'une 12, 1911". Serial No. 174,184. p I

nograph to which the automatic stopping device is herein disclosed asapplied comprises, a cover 10, a circular hor zontal rec- 0rd support 11rotatable about a central ver-.

tical spindle 12 and having a peripheral cylindrical downwardlydepending rim 28, a

spring or electric motor of usual construction (not shown) located belowthecover 10 0rd support 11 about a vertical axis located at the rear ofthe machine adjacent the:

and adapted to rotate the support 11, a tone arm 18 swingable to and froabove the T80.

periphery of the support 11, and a repro ducer 29 having a needlecoiiperable with the the record support 11.

The automatic stopping mechanism coniprises a bracket 13, a brake 16, alatch 22,

an operating lever 14, a trip arm 19, and anv indicator arm 15. Theseelements are preferably formed of sheet metal with the use The brake 16is pivotally mounted upon the bracket 13 adjacent the tone arm axis, andhas a pliable shoe 32 which is engageable with the interior of the'rim28 of the sup-. port 11, as shown in Fig. 1. A helical ten* sion spring17 connecting the brake 16 and bracket 13, normally urges the brake shoe32 toward the rim 28. The brake 16 is provided with an elongated openinghaving a latch moving surface 24, at one portion thereof, and having anabutment 26 at another portion thereof. An upwardly extending projection.27 forms a second abutment on the brake 16. Y

sp ral thread of a disk record 20 placed upon The latch 22 is mounted toswing upon the bracket 13 about a pivot 23 which adjustably frictionallyclamps the latch against The upwardly extending projection 25 of thelatch 22 projects through the opening in the brake 16 and is adapted tosuccessively engage the brake surface 2e and ment 26,

The operating element or lever 14 has a central pivot 30 upon thebracket 13, and

the abuthas a readily accessible manipulating handle 35 located adjacentthe periphery of the record support 11 at the front ofthe machine. Therear end of the lever 14: projects over the brake 16, and is movableinto engagement with the latch projection 25 and with the brakeprojection 27.

The trip. arm 19 is mounted to swinguponthe braclretl, abput the pivotwhich of a; suitable handle 31. V The frictional engagement between thearms 15, 19 and the latch 22, produced by the pivot 23, allowsadjustment of the arm 15 relatively to the plate 21; without necessarilydisplacing, the latch 22.

inv operating the device, ltis at first desirable toascertain just whenthe tone arm 18 should engage the trip arm 19, in order to automaticallystop the machine when the record 20 has been completely reproduced. Thismay be accomplished by placing. a record 20 upon the record support 11and. locating the reproducer needle at or near the endof the recordthread. As practically all standard records haveseveral revolutions atthe tliread end, entirely free from sound re producing undulations, itis not necessary to stop the machine at the exact moment the end of thethread is reached by the needle. Thetrip arm 19 may then be brought intoengagement with the tone arm 18 as indicated in Fig. 1, by manipulatingthe indicator 211111.15, the frictional connection between the latch 2:2and the arms 15, 19 permitting relative movement of these elements. Therecord 20. may then be marked on its faceor otherwise, with a numbercorresponding to the number on the graduated plate 21, with which thepointer registered when the trip arm shoe just engaged the stone arm 18.

the rim .28. As the brake 16 swings in an anti-clockwise direction, therelative movement of the brake 16 and latch causes the projection 25 ofthe latch to advance along the brake opening and to eventually strikethe surface 24:. The inclination ofthis surthe beginning of the recordthread, and this v thread being a spiral in, form automatically causesthe tone arm 18 and rcproducer 29. to,

more in a clockwise direction about the tone arm axis, as the record QO.rotates. When the reproducer needle approaches the end of the recordthread, the tonearm 18 engages the shoe of the trip arm 19 and graduallymoves the triparm 19, indicator arm 15 and latch 22, about the pivot 23in an ant-i clockwise direction. This motion of thelatch graduallyslides the latch projection 25 along the brake abutment 26, returningthe indicator arm 15 toward its initial position. is the arm 15 assumesits initial position the latch projection 25 is pushedoff of theabutment 26, and-the spring l'ii'becomes effective to quickly movethe'brake 16 in a clockwise directionand to bring the brake shoe 32 intoengagement with the rim 28. therebv stopping the machine. I

When it is desired to manipulate the brake manually and withoututilizing the automatic stop, the brake 16 should. first. be set afterwhich the trip and indicating arms 1%), 15sho-uld be swung in ananti-clockwise direction to such an extent that the tone arm 1 18 willnot engage the projection 33 of the trip arm 19.

The brake 16 may then be manually released by swinging the operatinglever 14: in a clockwise direction. After release, the brake 16 may beset manually by swinging the operating lever let in ah anti-clockwisedirection until the rear end of the lever engages the projection 25 ofthe latch 22 and pushes this projection oil of the abutment 26,whereupon the spring 17' willimmediately become eli'ective tomove thebrake shoe 32 into engagement withthe rim 28. i

The brake 16 may also be set by manually swinging the indicator arm 15in an anticlockwise direction about its pivot 23,.this movement of thearm 15 simultaneouslv swinging the latch 22 in an anti-clockwisedirection and causing the latch projection 25 to slide along and off ofthe brake abut-- ment 26. It will. thus be noted that while the brake 16may be releasedto start themachine, only by operating. the lever. 14:,the

-brake may beset/to stop the machine at arm pivot, the radial distancebetween the trip arm shoe and the pivot 23, and the length of the latch22, may be reduced to a minimum. With this construction, due to therelatively short radii, the projection 25 will be moved a sufiicientdistance to produce disengagement between the latch projection 25 andthe brake abutment 26, upon very slight angular displacement of the triparm 19, thus producing a quick acting sensitive automatic stop. Thelocation of the manually manipulable end of the operating lever 14: atthe front of the machine,provides for easy manual actuation of themechanism.

The various elements of the stopping mechanism may be readilymanufactured from sheet metal with the use of dies at a very low cost.As none of the elements of the stopping mechanism require attachment toany of the phonograph parts other than the cover 10, the mechanism maybe readily applied to any of the standard disk types of soundreproducing machines. All of the essential elements of the stoppingmechanism being mounted upon the bracket 13,

makes it possible to exploit the device in assembled condition ready forattachment to the phonograph.

It should be understood that it is not desired to be limited to theexact details of construction herein shown and described, for variousmodifications within the scope of the appended claims may occur topersons skilled in the art.

It is claimed and desired to secure by Letters Patent:

1. In combination, a movable element, a brake for said element, meansfor setting said brake, latch means for holding said brake in releaseposition, means movable in one direction to release said latch means topermit operation of said setting means and movable in the reversedirection to eifect release of said brake, a trip arm for releasing saidlatch means, and an indicator arm for releasing said latch means.

2. In combination, a rotary element, a brake for said element, means forsetting said brake, a latch for holding said brake in release position,manually operable means movable in one direction to release said latchto permit operation of said setting means and movable in the reversedirection to move said brake to release position, a trip arm forreleasing said latch, and anindicator aimv for releasing said latch.

3. In combination, a rotary element, a

brake forsaid element, a spring for setting said-brake,a latchfor'holding said brake in releaseposition, an operating lever movable inone direction to release said latch to permit operation of saidspringand movable in the reverse direction to move said brake to releaseposition, a trip arm for releasing said latch, and an indicator arm forreleasing said In combination, a brake having a plurality of abutments,a latch having a projection engageable with one of said abut-r ments tohold said brake in released position, said brake having a surface formedto engage and move said latch projection into said engaging positionupon movement of said brake, to released position and an operating leverengageable with another of said brake abutments to move said brake andsaid latch into said engaging position, said lever also being engageablewith said latch projection to disengage said latch from said brakeabutment.

5. In' combination, a brake having a plurality of abutments, a latchhaving a projection engageable with one of said abutments to hold saidbrake in released position, said brake having a surface formed to engageand move said latch projection into said engaging position upon movementof said brake to released position, an operating lever engageable withanother of said brake abutments to move said brake and said latch intosaid engaging position, said lever also being engageable with said latchprojection to disengage said latch from said brake abutment, and meansfor automaticall disen gaging said latch from said brake abutment at apredetermined time.

6. In combination, a rotary element, a brake for said element, a latchfor holding said brake in released position, a manually operable levercooperable directly with said brake to release the same and alternatelycooperable with said latch to permit setting of said brake, a trip armautomatically cooperable with said latch to permit setting of saidbrake, and an indicator arm cooperable with said latch to permit settingof said brake.

7 In combination, a brake, a latch engageable with said brake to holdthe same in released position, means for automatically placing saidlatch into brake engaging position upon release of said brake, amanually operable lever engageable with said brake to move the same intoreleased position and engageable with said latch to disengage said latchfrom said brake, and other means for automatically disengaging saidlatch from said brake at a predetermined time.

8. In combination, a brakehaving a plurality of abutments, a latchengageable with one of said abutments to hold said brake in releasedposition, means for placing said leased posit-ion andengagea ble withsaid:

for automatically disengaging said. latch from: saidffirst mentionedbrake abutment at a pltedetermined time;

In iestimony whereaf, the signature of" the im'en'bov is afiixed:hereto.

OSWALD H. HAN-SEN,

latch: into said abutment engaging.- positien upon release ofsaidvbrakma manually: 0pemble lever engageable with anothen 015 said.brake abufinen'ts to anuvasaidbmke interelaichto disengage said latchfrom saidufirst mentloned brake abutment, and other means Copies of thismm may be obtained for five mam ea fii, addressing the Gummisaiemr oi"Eatems,

Washingtom 11*, 3G.

